#include <iostream>
#include <vector>

using namespace std;

// 3201. 找出有效子序列的最大长度 I
// https://leetcode.cn/problems/find-the-maximum-length-of-valid-subsequence-i/description/

class Solution {
public:
    int maximumLength(vector<int>& nums) {
        
    }
};

int main()
{
    return 0;
}